31111220130030 has 192 divisors, whose sum is σ = 85637790830592. Its totient is φ = 7823864079360.

The previous prime is 31111220130019. The next prime is 31111220130043. The reversal of 31111220130030 is 3003102211113.

31111220130030 is a `hidden beast` number, since 3 + 1 + 111 + 220 + 1 + 300 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31111220129985 and 31111220130012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 51647559 + ... + 52246461.

It is an arithmetic number, because the mean of its divisors is an integer number (446030160576).

Almost surely, 2^{31111220130030} is an apocalyptic number.

31111220130030 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31111220130030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42818895415296).

31111220130030 is an abundant number, since it is smaller than the sum of its proper divisors (54526570700562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31111220130030 is a wasteful number, since it uses less digits than its factorization.

31111220130030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599423 (or 599420 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31111220130030 its reverse (3003102211113), we get a palindrome (34114322341143).

The spelling of 31111220130030 in words is "thirty-one trillion, one hundred eleven billion, two hundred twenty million, one hundred thirty thousand, thirty".